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. 2019 Feb 6;12(2):e007577. doi: 10.1161/CIRCINTERVENTIONS.118.007577

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© 2019 The Authors.

Circulation: Cardiovascular Interventions is published on behalf of the American Heart Association, Inc., by Wolters Kluwer Health, Inc. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution, and reproduction in any medium, provided that the original work is properly cited.

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Figure 4. — Scatter and Bland-Altman plots demonstrating how planner tool improves estimation of FFR_true. Top, Scatterplots comparing the (left to right) FFR_pullback, FFR by computed tomography (FFR_CT), and FFR_CT-derived percutaneous coronary intervention (PCI) planning tool (FFR_CT-P) against true FFR. Solid lines represent the best linear fit to the data and dotted lines represents the line of identity (x=y). Bottom, Bland-Altman plot comparing the differences between FFR_true and FFR_pullback, FFR_CT, and FFR_CT-P (left to right). Solid line represents the mean difference, and dotted lines correspond to the 95% CIs. FFR indicates fractional flow reserve.